Jesus instructs Peter to 'cast a hook' (ankistron) and take the first fish caught, whose mouth will contain a coin for the temple tax (Matthew 17:27). This is the only New Testament occurrence of the word, though it's common in classical texts for fishhooks. The miraculous provision combines ordinary means (fishing) with supernatural knowledge (which fish, where, what's in its mouth). That Jesus specifies hook-and-line fishing rather than net fishing may suggest Peter's solitary mission—one fish for one specific purpose. The word derives from 'ankos' (bend), describing the hook's curved shape.